Spyder Stinger 14-Piece Assorted Woodboring Spade Drill Bit Set

The patented stinger™ drill bit design features an innovative self-feeding tip. Because of the recessed edge of the threaded center point, the bits will not jam or clog, and they automatically engage the work surface at optimal feed and speed. No additional force is needed, even if the work performed is at an angle or upside down.